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Inflammatory and infectious diseases of the orbit
Exam I AOD
9
Pathology
Undergraduate 2
09/09/2011

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Term
Orbital Inflammatory Pseudotumor (IOID)
Definition
Defined, as nonspecific and non-neoplastic inflammatiory lesion that occur in the orbit with diverse pathological appearances but generally displaying a polimorphous chronic inflammatory infiltration. Can involve any orbital structure. AKA idiopathic orbital inflammaotry disease. Pain is important.
Term
Clinical features of Pseudotumors and Etiology
Definition
T.B. Syphilis, sarcoidosis, bacteria, fungi, virus, parasites.

Happens more in middle age men. Restricts ocular movement, pain, diplopia, may be palpated like a tumor. Resemble a neoplasm.
Term
Differential diagnosis of pseudotumors
Definition
Lymphoid hyperplasia, lymphoid speudotumor, lymphoma, lymphangioma, orbital cellulitis, wegner granulomatosis metastasis, rabdomyosarcoma, leaking dermatoid cyst, spontaneous orbital hemorrhages
Term
Treatment of Pseudotumor
Definition
Excision (recurrence), Anti-infective chemotherapy (unsuccessful), Radiation (usually effective, but not always, low dose), Steroid long time for long periods of time. Follow because later can develop into neoplastic disease.
Term
Orbital Cellulitis
Definition
Infection of connective or cellular tissue of the orbit. Caused by nasal or ethmoidal sinus infection (85%), dental infections, dacryocystitis. Caused by Haemophilus influenzae and streptococcus pneumoniae and more frequently strepto or staphilococci
Term
Clinical features of orbital cellulitis
Definition
Malaise, fever, pain, proptosis, impaired mobility of the eyeball, red eye and eyelid's edema, VA, chemosis (extremem conjunctival swelling) blurred vision, diplopia, tooth pain, sinus headache, supraorbital pain or hypesthesia, nasal congestion.
Term
Differential diagnosis of orbital cellulitis
Definition
Insect bite, acute chalazion, pseudotumor, grave's orbital periositis, orbital abscess and subperiosteal abscess. Maemangioma, neurofibroma, orbital rhabdomysarcoma (in kids).
Term
Complications of Orbital cellulitis
Definition
Cavernous sinus thrombosis, optic neuritis, cerebral abscess or sepsis
Term
Treatment of Orbital cellulitis
Definition
Hospital admission, blood cultures, antibiotics, drained, early consult with an otolaryngologist
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